Slide rule belt carrier



y 3, 1952 cs. MANGOLD ET AL 2,602,574

SLIDE RULE BELT CARRIER Filed Oct. 19, 1949 22 Fig. I Q

. g- 1T 4 Q 6 3 INVENTORS GEORGE MANGOLD FREDERICK ZENER BY V W L ATT NE) Patented July 8, 952

2,602,574" suns RULE BELTWCARRIEBI George Mangold, North Bergen, and Frederick Zener, Hasbrouck Heights, N. J., assignorslto Keuffel 8: Esser Company, Hoboken, N. J a corporation of New Jersey 7 i Y r Application October 19, 1949, Serial No. 122,23

This invention relates to a device for attachin a slide rule case to a belt. It is particularly useful with the type of slide rule case of Patent No. 2,000,337 to Adolf W. Keuffel.

Engineering students are usually required to carry a slide rule from class to class and because the conventional slide rule is too large to put in ones pocket, it is awkward to carry and there is danger of its becoming lost. The present invention provides means for attaching the slide rule case tothe students belt whereby the slide rule is always Within convenient reach and cannot become lost.

The means of accomplishing the objects of the invention will be apparent from the following description taken in connection with the accompanying drawing in which:

Fig. I is a view in rear elevation showing a slide rule case with the belt carrier attached.

Fig. II is a view in side elevation and partly in section along the line II-II of Fig. I showing the same slide rule case with belt carrier attached.

Fig. III is a View similar to the view of Fig. II

but which is enlarged and exploded to show the essential parts more clearly.

' The slide rule case shownin the drawing is a commercial slide rule case. This particular case has a flap 2 for closing the top end of the case, which flap is secured to the back of the case 3, passes over the top of the case and is provided with a tongue at the front which is held in position by passing it under a transverse strap 4. The construction of the transverse strap 4 may be as taught in Patent No. 2,000,337 but the particular tongue holding means provided on the case does not affect the use of the belt carrier which is the subject matter of this invention.

The flap 2 of the commercial slide rule case shown in the drawing is secured to the back of the case 3 by two rivets 5 and 8. The flap 2 is reenforced at the point of riveting by a flat strip of stiff material it! which is preferably of sheet steel. The flat reenforcing strip of stiff material lil extends under the flap 2 and covers an area near the lower edge of the flap which area includes the points at which the rivets 6 and 8 pass through the flap 2. The reenforcing strip I may also be provided with an extension that is bent up over the lower edge of the flap 2 and is pressed into intimate contact with the lower edge of the flap 2. This type of reeniorcing strip I0 is standard on a commercial slide rule case and the equivalent for purposes of this invention may readily be provided on other slide rule cases. For example, a reenforcing strip of stifi materialcould 1 Claim. (01. 224 -5) be made of steel wire.

- material It is provided with a reverse bend which '2 be applied outside of the flap 2 instead of between the flap and the back of the case.

To accomplish the purpose of this invention an attachment i2 is provided which permits the slide rule case to be readily attached to a belt. The attachment I2 is made up of a strip of flat stiff material It and a loop or ring It which may The strip of flat stiff serves as a hook at its upper end and with a loop on its lower end. The loop on the lower end of the strip of flat stiff material it engages the loop 16.

The attachment i2 made up of the flat strip l4 and the loop l6 may be secured to the slide rule case in the following manner. The flap 2 of the slide rule case is opened and the attachment l2 with the loop I6 at the bottom and the fiat strip M with the hook facing outward is forced down between the rivets 6 and 8 and between the reenforcing strip Hi and the back of the slide rule case 3 until the loop provided at the lower end of the strip of fiat stifi material Hi extends below the lower edge of the flap 2 and the hook provided on the upper end of the strip of flat stiff material it engages the upper edge of the reenforcing strip l0.

The flat strip H5 is preferably bent so that the hook on its upper end and the loop on its lower end are spaced so that they just span the width of the reenforcing strip It If the reenforcing strip is provided on the outside of the flap 2, the attachment should then be inserted between the reenforcing strip and the flap. If it is not desired to have the flat strip i4 detachable it may be made integral with the reenforcing strip it. The ring or loop [6 may be made detachable from the fiat strip of stifi material 14 by making the ring [5 in the form of a split ring similar to a key ring.

A loop of material forming a strap 13 is provided with a conventional snap hook 20 by means of which it may be detachably fastened to the loop 16. The strap it is joined together by means of a snap 22. When the snap 22 is opened, the strap 18 may be passed around a belt and the loop closed by means of the snap 22 so that the snap hook 29 opens to the front. The slide rule case may then be secured to the belt by joining the loop 16 to the strap l8 by means of the snap hook 20.

The invention provides a beltcarrier for a slide rule case in which a loop or ring is secured to the case. This loop may be detachably secured to z strap which may in turn be fastened around a Having thus described the invention, what is claimed is:

An attaching strip for a slide rule case carrying a ring by means of which the slide rule case may be attached to a persons belt comprising a flat strip of stifi material having a reverse bend forming ahook 'at one end and a r-bend forming a loop atthe-otherend" for carryingsaid ringmsaid flat strip of stifi material being adapted to fit between an outer wall of the slide rule case and a second strip of stiff material secured to said Wall of the slide rule case at both ol it'sendsand extending in a direction substantially perpendioular to the length of the slideruleeaseso that" said hook engages one edgeofsaid secondstrip 15 of stiff material and so that said loop extends beyond the other edge of saidsecondstrip oi FREDERICK ZENER.

4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 551,512 schildhauert riawgDec. 17, 1895 702-3981 Bowyer' a;1- a;. .Jur-ie 1'7, 1902 778,636 Coram Dec. 27, 1904 815,277 Facette Mar. 13, 1906 1,208,728 Bartlett et a1 Dec. 19, 1916 1,816;284 Hughes July 28, 1931 2,543,313 Dietzgen Feb. 27, 1951 FOREIGN PATENTS Number Country Date 442,627 Great Britain Feb. 12, 1936 

